Display Scan Line Shield Layout for Coupling Noise Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Coupling noise occurs between wiring lines in display devices, degrading image clarity and performance, particularly in high-resolution displays.
Innovation Solution
A shield pattern is implemented to overlap both the second drain electrode pattern and the scan line, electrically charged with a constant voltage to act as a barrier and reduce unwanted electrical coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If wiring lines are arranged closely to reduce display device size, then device compactness is improved, but coupling noise between wiring lines increases
Solution Approach 1:
A shield pattern is introduced as an intermediary element between the scan line and the second drain electrode pattern. This shield pattern, charged with a constant voltage, acts as a mediator that blocks the capacitive coupling between the signal-carrying wiring lines, thereby reducing coupling noise while allowing the lines to remain in close proximity for compact device design.
Solution Approach 2:
The shield pattern converts the potentially harmful electromagnetic coupling between wiring lines into a beneficial effect. By strategically positioning the shield pattern and charging it with a constant voltage, the design transforms what would be a noise source into a noise-suppressing structure that actively reduces unwanted coupling between signal lines.
2Reliability
If shield pattern is added to reduce coupling noise, then signal integrity is improved, but device structure becomes more complex
Solution Approach 1:
The shield pattern serves multiple functions simultaneously: it acts as a noise barrier to reduce coupling between wiring lines, provides a constant voltage reference to stabilize the electromagnetic field, and can be integrated into existing transistor structures without requiring entirely separate components. This multi-functionality reduces the net increase in device complexity.
Solution Approach 2:
The shield pattern is merged with the existing transistor structure, specifically positioned between the first and second transistors in the pixel circuit. This integration allows the shield pattern to function as part of the existing device architecture rather than adding a completely separate system, thereby minimizing the increase in structural complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Significantly reduces coupling noise, improving image quality and signal integrity, leading to enhanced display performance.
Implementation Method 1
electrically charged with a constant voltage to act as a barrier and reduce unwanted electrical coupling
Data Source
AI summary
A display device includes a base layer including a display area in which a plurality of pixels is disposed and a non-display area disposed adjacent to the display area, a gate driver disposed in the non-display area and configured to output a write scan signal, a scan line, and a shield pattern. The scan line includes a vertical line extending from the gate driver in a first direction and configured to apply the write scan signal to the plurality of pixels, and a horizontal line extending in a second direction crossing the first direction and electrically connected to the vertical line. The shield pattern overlaps the vertical line.